Contents
- Weather in September
- Frequently asked questions
- Average temperature in September
- Average pressure in September
- Average wind speed in September
- Average humidity in September
- Average rainfall in September
- Average rainfall days in September
- Average snowfall in September
- Average snowfall days in September
- Average daylight in September
- Average sunshine in September
- Average sunshine days in September
- Average UV index in September
- Average cloud cover in September
- Average visibility in September
Weather in September
Temperature
The onset of September is marked by a minor decrease in temperature, transitioning from a moderately hot 84°F (28.9°C) in August to a still warm 76.8°F (24.9°C). In September, Alta Vista records an average nighttime temperature of 55.8°F (13.2°C).Humidity
June and September, with an average relative humidity of 46%, are the least humid months in Alta Vista.Rainfall
In Alta Vista, during September, the rain falls for 8.2 days and regularly aggregates up to 0.55" (14mm) of precipitation. Throughout the year, there are 83.6 rainfall days, and 9.41" (239mm) of precipitation is accumulated.Snowfall
January through May, September through December are months with snowfall in Alta Vista. September is the first month it typically snows in Alta Vista. Throughout September, in the average 0.1 snowfall days, it receives 0.04" (1mm) of snow. Throughout the year, in Alta Vista, there are 26.7 snowfall days, and 9.02" (229mm) of snow is accumulated.Daylight
The average length of the day in September in Alta Vista is 12h and 26min.On the first day of the month, sunrise is at 6:25 am and sunset at 7:26 pm. On the last day of September, sunrise is at 6:52 am and sunset at 6:40 pm MDT.
Sunshine
In Alta Vista, the average sunshine in September is 10.6h.UV index
In Alta Vista, the average daily maximum UV index in September is 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: In September, the UV index of 5 transforms into the following advice:
Heed the precautions - It is counselled to guard against solar damage. Considering the Sun's intensity during midday, it's wise to minimize direct exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Alert! The snow's reflection can amplify the UV radiation of the Sun nearly twice.
Frequently asked questions
What is the usual temperature for Alta Vista in September?
What is the least humid month in Alta Vista?
What is the average humidity in September in Alta Vista?
How much does it rain in Alta Vista in September?
When does it start snowing in Alta Vista?
What is the average length of the day in September in Alta Vista?
When are sunrise and sunset in September in Alta Vista?
How long on average sun shines in September in Alta Vista?
What is the UV index intensity in September in Alta Vista?
Average temperature in September
Alta Vista, CO
- Average high temperature in September: 76.8°F
The warmest month (with the highest average high temperature) is July (86°F).
The month with the lowest average high temperature is December (39°F).
- Average low temperature in September: 55.8°F
The month with the highest average low temperature is July (64°F).
The coldest month (with the lowest average low temperature) is December (22.3°F).
Average pressure in September
Alta Vista, CO
- Average pressure in September: 29.95"Hg
The months with the highest atmospheric pressure are January and December (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in September
Alta Vista, CO
- Average wind speed in September: 9.7mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (9.3mph).
Average humidity in September
Alta Vista, CO
- Average humidity in September: 46%
The month with the highest relative humidity is February (63%).
The months with the lowest relative humidity are June and September (46%).
Average rainfall in September
Alta Vista, CO
- Average rainfall in September: 0.55"
The wettest month (with the highest rainfall) is May (1.77").
The driest month (with the least rainfall) is December (0.2").
Average rainfall days in September
Alta Vista, CO
- Average rainfall days in September: 8.2 days
The month with the highest number of rainy days is July (14.3 days).
The month with the least rainy days is November (1.7 days).
Average snowfall in September
Alta Vista, CO
- Average snowfall in September: 0.04"
The month with the highest snowfall is February (1.93").
The months with the least snowfall are June, July and August (0").
Average snowfall days in September
Alta Vista, CO
- Average snowfall days in September: 0.1 days
The month with the highest number of snowfall days is February (6.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in September /
Average sunshine in September
Alta Vista, CO
- Average daylight in September: 12h and 2min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in September: 10h and 4min
The months with the most sunshine are June, July and August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 6h and 36min).
Average sunshine days in September
Alta Vista, CO
- Average sunshine days in September: 18.4 days
The month with the most sunshine days is December (24.9 days).
The month with the least sunshine days is July (13.4 days).
Average UV index in September
Alta Vista, CO
- Average UV index in September: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in September
Alta Vista, CO
- Average cloud cover in September: 16
The months with the most cloud cover are February and April (Cloud cover 27).
The months with the least cloud cover are June and September (Cloud cover 16).
Average visibility in September
Alta Vista, CO
- Average visibility in September: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Alta Vista, Colorado, USA
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